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diff --git a/278/CH4/EX4.4/ex_4_4.sce b/278/CH4/EX4.4/ex_4_4.sce
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+//1.)calculate the stress on the lower washers before the nuts are tightened,refer fig 4.5
+//2.)what could be the stress in upper and lower washers...
+clc
+//solution
+//given
+d=20//mm
+d1=22//mm
+d2=50//mm
+d3=22//mm
+d4=44//mm
+P1=120000//N
+P2=5000//N
+//1)stress on lower washer before the nuts are tightened
+pi=3.14
+A1=(pi/4)*(d2^2-d1^2)//(mm^2)
+A2=(pi/4)*(d4^2-d3^2)//(mm^2)
+//since load is equally distributed on 4 washers,therfore load Q1=P1/4
+Q1=P1/4//N
+//calculating stress on lower washer
+f2=Q1/A1//(N/mm^2)
+printf("\n the stress on lower washer when nuts are not tightened is,%f N/mm^2\n",f2)
+//2)
+//stres on upper washers
+P2=5000//N
+f3=P2/A2//stress//(N/mm^2)
+printf("the stress on upper washer is,%f N/mm^2\n",f3)
+//stress on lower washer when nuts are tightened
+f4=(Q1+P2)/A1//(N/mm^2)
+printf("the stress on lower washer when nuts are tightened is,%f N/mm^2",f4)
+\ No newline at end of file